#define _CRT_SECURE_NO_WARNINGS 1
#include<bits/stdc++.h>
using namespace std;
const int N = 1e5 + 10;
int a[N];

int main() {
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    int n; cin >> n;
    for (int i = 1; i <= n; i++) cin >> a[i];
    sort(a + 1, a + n + 1);
    int ans = a[2] - a[1];
    for (int i = 1; i < n; i++) ans = min(ans, a[i + 1] - a[i]);
    cout << ans << '\n';
    return 0;
}